Resumo

SILVA-DE-HOYOS, L. E. et al. Silver nanoparticles biosynthesized using Opuntia ficus aqueous extract. Superf. vacío [online]. 2012, vol.25, n.1, pp.31-35. ISSN 1665-3521.

Silver nanoparticles were synthesized using a green chemistry method. Stable silver nanoparticles in a colloidal aqueous solution were prepared successfully by the chemical reaction of silver nitrate (AgNO₃) and Opuntia ficus indica aqueous extract, used as both, reducing and stabilizing agent. Nanoparticle size, morphology and optical properties were analyzed by using transmission electron microscopy (TEM) and UV-Vis spectroscopy, respectively. TEM images revealed a nanoparticle average size of 23 nm. An absorption band centered around 398 nm was observed, this absorption corresponds to the surface plasmon resonance (SPR) of the silver nanoparticles.

Palavras-chave : Silver nanoparticles; bioreduction; green nanochemistry; Opuntia ficus indica; biogenic synthesis; optical properties.